Add openssf best practice badge (kserve#2525)

Signed-off-by: Dan Sun <[email protected]>

Signed-off-by: Dan Sun <[email protected]>

README.md

@@ -2,6 +2,7 @@
 [![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white)](https://pkg.go.dev/github.com/kserve/kserve)
 [![Coverage Status](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/andyi2it/5174bd748ac63a6e4803afea902e9810/raw/coverage.json)](https://github.com/kserve/kserve/actions/workflows/go.yml)
 [![Go Report Card](https://goreportcard.com/badge/github.com/kserve/kserve)](https://goreportcard.com/report/github.com/kserve/kserve)
+[![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/6643/badge)](https://bestpractices.coreinfrastructure.org/projects/6643)
 [![Releases](https://img.shields.io/github/release-pre/kserve/kserve.svg?sort=semver)](https://github.com/kserve/kserve/releases)
 [![LICENSE](https://img.shields.io/github/license/kserve/kserve.svg)](https://github.com/kserve/kserve/blob/master/LICENSE)
 [![Slack Status](https://img.shields.io/badge/slack-join_chat-white.svg?logo=slack&style=social)](https://kubeflow.slack.com/join/shared_invite/zt-cpr020z4-PfcAue_2nw67~iIDy7maAQ)